If u like how it smells on your skin then by all means buy it.
Polo Blue was my only cologne for 2 years. Till this day i have half left in my 100ml bottle. I tried so hard to finish it that i even used as a room freshener after smoking in my room. PB is not a bad fragrance but in terms of aquatics there are so many better out there. So before u buy PB maybe u can try Davidoff Cool Water Deep which is a better version of PB. IMHO of course.
Others in the Ralph Lauren line worth exploring are Polo Modern Reserve and Polo Double Black. Modern Reserve smells really classy and green to me. I'm actually looking to get a bottle. Double Black is quite liked here but i personally don't like it.
You certainly caught the fragrance buy didn't you.